The flaps tailors cut in the back of suit jackets, ostensibly for ventilation, but actually to allow arse bandits easier access. Most modern jackets have either one or two bandit flaps upon them, but traditional, well cut and stylish jackets will have nothing to do with this bizarre practice.
"Look at the bandit flaps on that guy's jacket!"
by Anonymous Cheesemonger January 26, 2006
Get the bandit flaps mug.